JP2003067277A - File transmission method and file transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform sending and receiving of a large scale file with high reliability by a client PC using the Internet which is apt to be unstable without any special operation. SOLUTION: A client PC 10 and a processing system constituted of a plurality of servers including a WWW server 20, an operational terminal server 30, an AP server 33, and a file server 34 are connected via the Internet 40. File data transfer between the PC and a transmission file 36 of the file server 34 is performed by using an HTTPS protocol that uses a dedicated program. The file data are split in a fixed sizes, compressed and transferred. Check points for retransmission are set for preparation of occurrence of a failure. Dedicate programs are prepared in correspondence with multi-platforms and can be used by downloading from a server in the extension of PC operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file transmission method and a file transmission system, and more particularly to a file transmission method and a file transmission system for transmitting a file between a client PC and a Web server under the Internet environment.

[0002]

2. Description of the Related Art As a conventional technique relating to file transmission between a client PC and a Web server in an Internet environment, a file is transmitted using the FTP protocol, a file is transmitted by designating an HTML input form. A method is known in which a dedicated program is installed in a PC and file transmission is performed using this dedicated program.

The method of using the FTP protocol of
For example, when uploading the local file of the client PC to the file of the Web server on the company intranet, the FW (firewall) provided at the entrance of the company intranet is set to be uploadable to enable the upload. There is a need.

Further, in the method of designating the HTML input form, the protocol that can pass through the FW is normally limited to HTTP because of its security. Therefore, the input form specified in the standard of HTML is used. File transmission must be realized by designating.

A method of installing a dedicated program on the client PC and using this dedicated program is to tunnel an original file transmission protocol to the HTTP protocol between the client and server. By implementing functions such as divided transmission of file data, even if a large file is transmitted, the server side application program is resident in memory, so it is possible to prevent the load on the server side from increasing. It has the advantage that

[0006]

According to the above-mentioned conventional technique, the FW is set to be uploadable and an unspecified IP address is set.
Since FTP uploading from the address is allowed, there is a problem that a malicious third party may send a large amount of data to puncture the disk in the server and bring down the server. .

In the prior art, since the file is transmitted from the client to the server with the same file size, the larger the file,
There is a problem that the memory residency time becomes longer until the application program on the server side reads the file data and outputs the file, which increases the server load.

Further, in the prior art, a file upload function, a file download function, a file data division transfer function, a transfer data compression function, a file upload, a resend function from a checkpoint at the time of abnormal download termination, and a timer. The problem is that a dedicated program having a large function such as a monitoring function must be installed in the browser PC in advance, and a dedicated program corresponding to the platform of the client PC must be prepared. have. In addition, this conventional technique, for each client PC,
There is a problem in that the installation of the dedicated program causes the user's operation to be troublesome, which hinders its spread on the Internet.

The object of the present invention is to solve the above-mentioned problems of the prior art and to use the unstable Internet,
The client PC uses the globally popular HTTPS protocol without any special operation,
Another object of the present invention is to provide a file transmission method and a file transmission system capable of efficiently transmitting and receiving a long file with high reliability.

[0010]

According to the present invention, the above object is to provide a file transmission method for transmitting file data between a client and a server via the Internet, which uses a dedicated program for transmission of file data. This is accomplished by using a protocol.

In the above description, the file data is file data divided into a certain size, the data is compressed and transmitted, and a checkpoint is added to the divided file data so that when a failure occurs, File data is retransmitted from the checkpoint using the checkpoint.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a file transmission method and a file transmission system according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of a file transmission system according to an embodiment of the present invention, FIG. 2 is a diagram for explaining setting of a dedicated program operating environment, and FIG.
FIG. 9 is a diagram illustrating downloading of a dedicated program. 1 to 3, 10 is a client PC,
11 is a batch file, 12 is a setting information file, 1
3, 22 are dedicated programs, 14 is plug-in means, 1
5 is a transfer directory, 16 and 36 are transfer files, 2
0 is a WWW server, 21 is a batch file, 23 is a server side application program, 24 is a WWW server product, 30 is a terminal operating WWW server, 31 is WW
W server product, 32 is an operation terminal application, 33 is an application (AP) server, 34 is a file server, 35 is a contract information file, 40 is the Internet, 41 is a terminal adapter, 42 is a router (R), and 50 is an operation terminal. is there.

As shown in FIG. 1, a file transmission system according to an embodiment of the present invention includes a client PC 10 and
WWW server 20, operation terminal server 30, AP server 3
3, a processing system including a plurality of file servers 34 is connected via a network such as the Internet 40. The plurality of servers constituting the above-described processing system are mutually connected via a network such as a LAN having a router 42, and the file server 34 is provided for each company or user as a customer who operates the client PC 10. The contract information file 35 that stores the setting information of the client PC 10 for each contract information and the transfer file 36 that holds the file for transferring the file between the transfer file of the client PC 10 are connected.

An operation terminal 50 is provided in a network such as a LAN.
Is used for inputting the setting information of the client PC for each contract information stored in the contract information file 35 described above, and the input information is the operation terminal WWW server 30. Is stored in the contract information file 35 via the WWW server product 31 and the operation terminal application program.

The WWW server 20 is a client PC 1
A batch file 21 having setting information of the operating environment of the dedicated program 0, a dedicated program 22 downloaded to the client PC 10, a server side application program 23, and a WWW server product 24 are configured. In addition, the client PC 10
A batch file 11 for receiving the setting information from the WW server 20 and storing it once, a setting information storage file 12 for storing the operating environment of the dedicated program, security information, etc., a dedicated program 13 downloaded from the WWW server 20, It is composed of a plug-in means 14, a transfer directory 15, and a transfer file 16 holding a file for transferring a file between the transfer file 36 of the file server, and is connected to the Internet 40 via a terminal adapter 41. ing.

The file transfer system configured as described above is suitable for use when, for example, a large amount of file information such as transfer information is transferred between a server system of a financial institution and a corporate user. It is a system that enables important information such as transfer information to be transferred with high security between a financial institution and a user via the relatively unreliable Internet. . In this case, the processing system including the plurality of servers shown in FIG. 1 is a system provided in a financial institution, and the client PC 10 is a terminal provided in a trading company or the like.

Next, the functional outline of the system according to the embodiment of the present invention as described above will be explained.

The embodiment of the present invention realizes file transmission by using the HTTP protocol which is less likely to be hindered by hacking or the like in order to reliably transfer a file which requires high security. Therefore, the firewall FW provided at the entrance of the processing system, which is not shown in FIG. 1, is set so as to allow only the passage of the HTTP protocol. And, in the sense of preventing wiretapping of transmitted and received file data, SS
The file is transmitted using the HTTPS protocol for L128-bit encryption.

In the embodiment of the present invention, in order to perform the file transmission as described above, a dedicated program for that purpose is used, and the dedicated program operating environment is set in the client PC in advance. To set this dedicated program operating environment, download the setting information (such as allowing file access for file transmission) for operating the dedicated program from the server,
This is done by automatically setting to the client PC.
As the setting information, a template for absorbing syntax differences such as Unix and Windows (registered trademark) can be externally set so as to be compatible with multiple platforms.

As described above, since the client is provided with the dedicated program and the file is transmitted by this dedicated program, the embodiment of the present invention is
The HTTP protocol between the servers has a function of tunneling a unique file transmission protocol. This original file transmission protocol has the function of compressing and dividing file data and transferring it to improve the transmission efficiency, and also checkpoint for resending when a failure occurs when dividing and transferring the file. Is provided so that inefficient internet communication does not need to perform inefficient operation such as data transmission from the beginning again. In addition to the above, the file transmission protocol includes VR management of a program dedicated to the client PC,
Functions such as file upload, file download, and timer monitoring are added.

The dedicated program is downloaded from the server to the client, but by adding an electronic certificate to the downloaded dedicated program, the manufacturer is clarified so that improper rewriting or the like does not occur. Then, the downloading of the dedicated program is performed as an extension of the user operation, so that the user is not bothered.

Further, according to the embodiment of the present invention, the dedicated program is made compatible with the multi-platform, so that it is not necessary to have the dedicated program for each platform. Further, the dedicated program can be downloaded from the server and used by extension of the operation of the client PC, and the installation is prevented from occurring.

Next, the setting of the dedicated program operating environment will be described with reference to FIG.

First, the setting information for enabling the dedicated program is provided to the company I or the user by the company I.
D, save in server together with user ID. The setting information to be stored may be set only for each company when the setting of the client PC is unified for each company, and is set for each user when the setting of the client PC is different for each user. The stored setting information includes a setting information template that describes the syntax for defining a transfer direct file that allows file access for file transmission, a transfer directory file name to be embedded in the setting information, and the setting information. The setting information automatic setting batch template is a batch file template for setting the setting information after being downloaded to, and these are described in Java (registered trademark).

When creating the setting information, the server uses the above-mentioned setting information template of the stored setting information,
By using the transfer directory file name to be embedded in the setting information and inserting the information of the transfer directory file based on the information of the setting information template, the dedicated program including the access authority to the transfer directory file and the access authority to the URL Create setting information for setting authority information.

Then, the server creates a setting information automatic setting batch. This batch is created by inserting the transfer directory file information based on the setting information automatic setting batch template information using the setting information automatic setting batch template of the stored setting information described above and the setting information created above. Then, the setting information automatic setting batch is created, and this information is stored in the batch file 21 as the setting information storage file.

The transfer directory name and URL name used by the dedicated program as the above-mentioned setting information are defined on the server side for each company and each user. For example, grant codeBase “ http://XXXXXXXX.co.jp/NetBank/ ” {permission java.io.FilePermission “ C: TEMP- ”, “read, write, delete, execute”; permission java.net.SocketPermission " XXXXXXXX.co.jp ", "accept, connect, listen, resolve";}; and so on. In this example, the underlined parts are, in order, the URL name where the dedicated program is stored, the transfer directory file name that allows the dedicated program to access, and the UR that allows the dedicated program to communicate.
It is L name.

The client PC 10 downloads the setting information automatic setting batch created as described above from the server batch file 21 and executes the batch to set the user policy of the setting information storage file 12 in the own PC. Insert the authority information of the dedicated program into.

As a result, the client PC 10 is automatically set by downloading the setting information stored in the server before downloading the dedicated program, and the environment for downloading and operating the dedicated program is prepared. It will be.

The client PC 10 downloads the dedicated program and transmits the file using the dedicated program. Next, the downloading of the dedicated program will be described with reference to FIG.

At the time of generating the dedicated program, the server adds the electronic certificate to the dedicated program to clarify the manufacturer of the dedicated program and prevent improper rewriting. At this time, the server also adds a 128-bit SSL encryption of the global server ID, and saves the dedicated program with the electronic certificate as the dedicated program 22 in its own server.

The downloading of the dedicated program on the client PC 10 can be performed by extending the user operation. Therefore, when downloading the dedicated program, the user only needs to confirm the manufacturer of the dedicated program on the “root certificate request confirmation screen” and input “OK”. In particular, the user installs the dedicated program. The dedicated program in the server can be taken in as the dedicated program 13 in the own PC without requiring any troublesome work.

The user activates the dedicated program with the certificate downloaded to the client PC 10 as described above, and thereby the file between the transfer file 16 in the own PC 10 and the transfer file 36 in the file server 34 is saved. The transmission can be done using a dedicated program.

In the embodiment of the present invention, as described above, the client is provided with the dedicated program and the file is transmitted by this dedicated program. Therefore, the HTTP protocol between the client and the server has its own file transmission protocol. Has a function of tunneling. Then, those functions will be described.

1. Client PC dedicated program VR
When the management client PC downloads the dedicated program, the management client PC temporarily saves it on the client PC side. Therefore, the client PC and the server are managed by giving the version number of the dedicated program. Client PC
However, when the dedicated program is activated, the server is queried and the server responds with the version number.
If the returned version number and the version number held in the client PC do not match, the dedicated program of the client PC terminates once and downloads the dedicated program of the new version number from the server.

2. File upload The client PC has a function of uploading a specified file to the server, and uses HTTPS for communication.

3. File download The client PC has a function to download a file from the server to the specified file.
Use TPS.

4. Divided transfer of file data This function divides the file when sending it and sends it at fixed time intervals. The size and interval of division are
Follow the information stored on the server side.

5. This is a function to compress data when transferring a compressed file of transfer data. Whether or not to compress the data can be designated by the information held on the server side or by the operation when the file transmission is started.

6. Resend from checkpoint when file upload / download ends abnormally If a failure occurs during file transfer, the server retains the status before the failure and resends the file. , File resend is client PC
When instructed by, the server can perform transmission from the data next to the data already received.

7. The transmission of the timer monitoring file is performed by an inquiry response from the client PC, but when the response data is not returned within the monitoring time (no response), the file transfer is ended.

FIG. 4 is a flow chart for explaining the processing operation for setting the dedicated program operating environment when the client PC is used by one company and one company, and FIG. It is a flowchart explaining a setting processing operation, and these will be described next. The flows shown in FIGS. 4 and 5 have already been described with reference to FIG.
First, the flow of FIG. 4 will be described.

(1) When a file transmission start is instructed from the client PC, the server receives information such as the ID from the client PC and starts the process of creating and downloading the setting information automatic setting batch. , It is determined whether or not there is setting information for each user (step 401,
402).

(2) If it is determined in step 402 that there is no setting information for each user, the setting information for the company ID stored in the server is acquired, and if there is setting information for each user, the user Obtain ID setting information (step 4)
03, 404).

(3) Using the acquired setting information, the server creates the setting information to be set in the client PC and the setting information automatic batch, as described in detail with reference to FIG. 2 (step). 405, 406).

(4) After that, the server downloads the setting information automatic batch to the client PC and ends the processing (steps 407 and 408).

(5) Since the setting information automatic batch is downloaded to the client PC, the processing shifts to the client PC, the client PC starts the processing of the setting information automatic batch, and the setting information has been stored in the setting information storage file. Or not (steps 409, 4)
10).

(6) If it is determined in step 410 that the setting information has not been stored in the setting information storage file, the setting information is added to the setting information storage file and the process ends (step 411).

(7) If the setting information is already stored in the setting information storage file in the judgment of step 410, the setting information in the downloaded batch is compared with the setting information in the own PC, and the setting information contents are obtained. It is determined whether there is a change (step 412).

(8) If it is determined in step 412 that the contents of the setting information have not been changed, the process is terminated. If the contents of the setting information are changed, the setting information of the setting information storage file in the own PC is displayed. After updating, the processing is ended (step 413).

The above-mentioned processing was performed when the client PC was used by one company and one company.
The process when a plurality of companies are used will be described with reference to the flow shown in FIG. The flow shown here is a process in the client PC after the aforementioned setting information automatic batch is downloaded.

(1) Since the setting information automatic batch is downloaded to the client PC, the client P
The C starts the processing of the setting information automatic batch and determines whether or not the setting information is already stored in the setting information storage file (steps 409 and 410).

(2) If it is determined in step 502 that the setting information has not been stored in the setting information storage file, the setting information is added to the setting information storage file and the process ends (step 503).

(3) If it is determined in step 502 that the setting information is already stored in the setting information storage file, the setting information in the setting information storage file is updated to the setting information for each user and the process is terminated ( Step 504).

FIG. 6 is a flowchart for explaining the VR management processing operation of the dedicated program, which will be described below.

(1) When the dedicated program is started in the client PC and the dedicated program VR management process is started, the client PC first transmits a VR inquiry to the server (steps 601, 6).
02).

(2) When the server receives the inquiry from the client PC, the server manages V in its own server.
The R information is taken out and the VR information is transmitted to the client PC as the response information (steps 603 and 604).

(3) The client PC receives the VR information as the response information and manages the VR information in its own PC.
It is determined whether or not the information and the returned VR information match (steps 605 and 606).

(4) Both VRs are judged by the judgment in step 606.
If they match, the processing here is ended. If they do not match, a dedicated program having a new VR is downloaded and the processing here is ended (step 60).
6, 607).

FIG. 7 is a flow chart for explaining a file upload process for transmitting a file from the client PC to the server, which will be described below.

(1) When the file upload process is started in the client PC, the dedicated program in the PC reads the specified file from the transfer file 16 in the PC and performs data compression / assembly. This process
The processing is continued until the data amount becomes the division size or the end (EOF) of the file included in the data can be detected (steps 701 to 703).

(2) In step 703, when the data compression / assembly has reached the division size or when the end of the file is detected, the file data is transmitted to the server,
Receive a response from the server (step 70).
4).

(3) It is determined whether or not the transmitted data includes information indicating the end of file (EOF),
If the information indicating the end (EOF) of the file is not included, the process returns to step 702 to continue the process for the information of the next division size of the file, and the information indicating the end (EOF) of the file is included. If so, the transmission of the instructed file has been completed, so the processing on the client PC ends (step 705).

(4) On the other hand, the server executes the above-mentioned step 7
In the processing of 04, the file data transmitted from the client PC is received, the data is decomposed and decompressed, and the data is written in the transfer file 36 in the own server.
08 (steps 706 and 707).

(5) It is judged whether the file data stored in the transfer file 36 includes the information indicating the end of the file (EOF), and the information indicating the end of the file (EOF) is not included. In this case, returning to the processing of step 706, if the data of the next division size of the file is continuously received and the information indicating the end of the file (EOF) is included, it means that the reception of the entire file is completed. Ends the process at the server (step 70).
9).

FIG. 8 is a flow chart for explaining a file download process for transmitting a file from the server to the client PC, which will be described below.

(1) When the file download process is started by the client PC, the dedicated program in the PC requests the server to download the file by designating the content of the file (steps 801, 80).
2).

(2) When the server receives the download request for this file, it transfers the transfer file 36 in its own server.
Read the specified file from and compress and assemble the data. This process is continued until the amount of data reaches the division size or the end (EOF) of the file included in the data can be detected (steps 803 and 804).

(3) In step 804, when the data compression / assembly has reached the division size or when the end of the file is detected, the file data is transmitted to the server,
Receive a response from the server (step 80).
5).

(4) After that, the server checks the checkpoint of the transmitted data in the checkpoint storage file 7
08, it is determined whether the transmitted file data includes the information indicating the end of the file (EOF). If the information indicating the end of the file (EOF) is not included, the process proceeds to step 803. Returning to the processing, when the processing for the data of the next division size of the file is continued and the information indicating the end of the file (EOF) is included,
Since the transmission of the entire file has ended, the processing in the server ends (steps 806 and 807).

(5) On the other hand, the client PC receives the file data transmitted from the server in the processing of step 805 described above, decomposes and decompresses the data, and then its own PC.
Write to the transfer file 16 inside (steps 809, 8
10).

(6) It is judged whether or not the file data stored in the transfer file 16 includes the information indicating the end of the file (EOF), and the information indicating the end of the file (EOF) is not included. In this case, returning to the processing of step 809, if the data of the next division size of the file is continuously received and the information indicating the end of the file (EOF) is included, it means that the reception of the entire file is completed. The process on the client PC is finished (step 811).

Uploading the file described above,
At the time of downloading, a check digit bit is added to the data being transmitted to prevent data loss and falsification, and the data is transmitted. Also, as a checkpoint,
A division number or the like sequentially assigned may be used for the divided file data.

FIG. 9 is a flow chart for explaining the process of retransmitting a file from a checkpoint when a failure occurs during uploading, which will be described below. The processing here is step 7 in the flow of FIG.
In processes 04 and 706, when the client PC transmits data, receives a response from the server, and transmits data, the response from the server cannot be obtained due to a failure or the like. .

(1) When the dedicated program of the client PC detects a failure during the transmission of the file data, it starts the resending process from the checkpoint, and first sends to the server the checkpoint to be resent. An acquisition request is transmitted (steps 901 and 902).

(2) The server receiving the checkpoint acquisition request reads the checkpoints from the storage file 708 that stores and manages the checkpoints of the file data received before the occurrence of the failure, and loads the checkpoints on the client PC. Respond (step 903).

(3) Since the client PC that has received the checkpoint transmitted from the server has acquired the retransmission checkpoint, the retransmission checkpoint is set as the reading point of the transfer file 16 (step 905).

(4) After that, the same processing as the processing in steps 702 to 709 described with reference to FIG. 7 is continued (steps 702 to 709).

FIG. 10 is a flowchart for explaining the process of retransmitting a file from a checkpoint when a failure occurs during downloading, which will be described below. The processing here is the processing of steps 805 and 809 in the flow of FIG. 7, and while the server is transmitting the data and receiving the response from the client PC and transmitting the data, the processing is generated from the server. This is the process when the data of is no longer available.

(1) The dedicated program of the client PC, upon detecting the occurrence of a failure in the middle of transmission of file data, starts the resending process from the checkpoint, and first sends to the server the checkpoint to be resent. An acquisition request is transmitted (steps 101 and 102).

(2) The server receiving the checkpoint acquisition request reads the checkpoints from the storage file 708 which stores and manages the checkpoints of the file data received before the occurrence of the failure, and sends the checkpoints to the client PC. Respond (step 103).

(3) The client PC, which has received the checkpoint transmitted from the server, has acquired the resend checkpoint. Therefore, the resend checkpoint is reset to the write point of the transfer file 16, and the resend checkpoint is set. Request the server to resend the file data from the server (steps 104 to 106).

(4) Upon receiving the file data resend request, the server sets a resend checkpoint at the read point of the transfer file 36 (step 107).

(5) After that, the same processing as the processing in steps 703 to 811 described with reference to FIG. 8 is continued (steps 702 to 709).

The processing according to the above-described embodiment of the present invention is
This can be performed by configuring a processing program and executing the program, and the processing program can be provided by being stored in a recording medium such as HD, DAT, FD, MO, or CD-ROM.

In the above-described embodiment of the present invention, the file data is transmitted by using the HTTPS protocol. Therefore, the transmitted file data is encrypted and the wiretapping can be prevented, and the file protocol can be transmitted. Since the network configuration is such that no unspecified number of third parties can attack the server, an effect can be obtained.

Further, in the above-described embodiment of the present invention, since the client PC has the dedicated program for file data transmission and the file data to be transmitted is compressed, the transmission speed can be improved and the transmission can be improved. Since the file data to be transmitted is divided into a certain size and transmitted, the time required for the application program on the server side to stay resident in the memory for one data reception is kept within a certain time regardless of the size of the file. Since it can be stored and a checkpoint for retransmission is provided in case of failure, it is possible to obtain the effect that it is possible to eliminate the need to send data again from the beginning in unstable Internet communication. You can

Further, in the above-described embodiment of the present invention, since the check digit bit is provided in the data being transmitted, it is possible to obtain the effect that it is possible to prevent data loss, data tampering and the like.

Further, in the above-described embodiment of the present invention, since the dedicated program is made compatible with the multi-platform, it is not necessary to have the dedicated program for each platform, and the dedicated program can extend the operation of the client PC. Since it is downloaded from the server and made available for use, it is possible to obtain an effect that the user does not have to take troubles such as installation.

[0091]

As described above, according to the present invention, the client P is used by using the unstable Internet.
In C, it is possible to efficiently transmit and receive a long file with high reliability by using the HTTPS protocol widely used in the world without any special operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a file transmission system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating setting of an operating environment of a dedicated program.

FIG. 3 is a diagram illustrating downloading of a dedicated program.

FIG. 4 is a flowchart illustrating a processing operation of setting a dedicated program operating environment when the client PC is used by one company and one company.

FIG. 5 is a flowchart illustrating a processing operation of setting a dedicated program operating environment in a client PC when the client PC is used by a plurality of companies.

FIG. 6 is a flowchart illustrating a VR management processing operation of a dedicated program.

FIG. 7 is a flowchart illustrating a file upload process for transmitting a file from a client PC to a server.

FIG. 8 is a flowchart illustrating a file download process for transmitting a file from a server to a client PC.

FIG. 9 is a flowchart illustrating a process of retransmitting a file from a checkpoint when a failure occurs during upload.

FIG. 10 is a flowchart illustrating a process of retransmitting a file from a checkpoint when a failure occurs during downloading.

[Explanation of symbols]

10 Client PC 11 batch files 12 Setting information file 13,22 dedicated program 14 Plug-in means 15 Transfer directory 16, 36 Transfer files 20 WWW server 21 Batch file 23 Server-side application program 24 WWW server products 30 terminal operation WWW server 31 WWW server products 32 Operation terminal application 33 Application (AP) server 34 File Server 35 Contract information file 40 Internet 41 Terminal Adapter 42 Router (R) 50 operation terminals

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Yamagishi             890 Kashimada, Sachi-ku, Kawasaki City, Kanagawa Stock             Hitachi, Ltd. Financial Systems Division (72) Inventor Tetsuo Matoba             3-2-16 Omorikita, Ota-ku, Tokyo Stocks             Company Hitachi System and Service (72) Inventor Masami Kamiya             890 Kashimada, Sachi-ku, Kawasaki City, Kanagawa Stock             Hitachi, Ltd. Financial Systems Division F-term (reference) 5B082 HA05

Claims (10)

[Claims] 1. A file transmission method for transmitting file data between a client and a server via the Internet, wherein the file data is transmitted using an HTTPS protocol using a dedicated program. Method. 2. The file transmission method according to claim 1, wherein the transmitted file data is file data divided into a certain size, and the data is compressed. 3. A checkpoint is given to the divided file data, and when a failure occurs, the checkpoint is used to retransmit the file data from the checkpoint. File transmission method described. 4. The file transmission method according to claim 1, 2 or 3, wherein the dedicated program is made compatible with multiple platforms and is downloaded from a server as an extension of client operation. 5. The file transmission method according to claim 4, wherein an electronic certificate that identifies the manufacturer is added to the dedicated program. 6. The file transmission method according to claim 1, wherein the setting information for operating the dedicated program is downloaded from the server to the client. 7. The HTTPS protocol includes a version control function of a dedicated program, a file upload function, a file download function, a file data division transfer function, a transfer data compression function, a checkpoint resend function, and a timer monitor. 7. The file transmission method according to claim 1, wherein at least one of the functions is implemented. 8. A file transmission system for transmitting file data between a client and a server via the Internet, the transmission of file data being HTTP.
A file transmission system comprising a dedicated program executed using the S protocol. 9. The file transmission system according to claim 8, wherein the dedicated program is made compatible with multiple platforms, and an electronic certificate for identifying the manufacturer is added. 10. The HTTPS protocol includes a version control function of a dedicated program, a file upload function, a file download function, a file data division transfer function, a transfer data compression function, a checkpoint resend function, and a timer monitor. 10. The file transmission system according to claim 8, wherein at least one of the functions is installed.